<template>
  <nav-bar>
    <div slot="left" class="back" @click="backClick">
      <img src="@/assets/img/common/back.svg" alt="">
    </div>
      <div slot="center" class="title">
        <div v-for="(item,index) in titles" :key="index" class="title-item" :class="{active:index === currentIndex}" @click="titleClick(index)">{{item}}</div>
      </div>
    </nav-bar>
</template>

<script>
 import NavBar from '@/components/common/navbar/NavBar'

export default {
  name:"DetailNavBar",
  components:{
    NavBar
  },
  data(){
    return{
      titles:['商品','参数','评论','推荐'],
      currentIndex: 0
    }
  },
  methods: {
    titleClick(index) {
      this.currentIndex = index;
      this.$emit('titleClick', index);
    },
    backClick() {
      this.$router.back()
    }
  },
}
</script>

<style scoped>
  .title {
    display: flex;
    font-size: 16px;
    justify-content: space-evenly;
  }

  .title-item {
    flex:1;
  }

  .active {
    color: var(--color-high-text);
  }

  .back img{
      margin-top: 10px;
  }
</style>